endianness runtime check for ta2

1 files changed, 4 insertions, 0 deletions

diff --git a/src/preamble.js b/src/preamble.js
index 8feb43e9..bda76c80 100644
--- a/src/preamble.js
+++ b/src/preamble.js
@@ -446,6 +446,10 @@ if (HAS_TYPED_ARRAYS) {
   HEAPU16 = new Uint16Array(buffer);
   HEAPU32 = new Uint32Array(buffer);
   HEAPF32 = new Float32Array(buffer);
+
+  // Endianness check (note: assumes compiler arch was little-endian)
+  HEAP32[0] = 255;
+  assert(HEAPU8[0] === 255 && HEAPU8[3] === 0, 'Typed arrays 2 must be run on a little-endian system');
 #endif
 } else
 #endif